lib: Add ASan support to ramstage on x86 arch

This patch adds address sanitizer module to the library and reserves
a linker section representing the shadow region for ramstage. Also,
it adds an instruction to initialize shadow region on x86
architecture when ramstage is loaded.

Change-Id: Ica06bd2be78fcfc79fa888721ed920d4e8248f3b
Signed-off-by: Harshit Sharma <harshitsharmajs@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42496
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

2 files changed, 119 insertions, 0 deletions

diff --git a/src/include/asan.h b/src/include/asan.h
new file mode 100644
index 0000000000..8816eafbf4
--- /dev/null
+++ b/src/include/asan.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASAN_H
+#define __ASAN_H
+
+#define ASAN_SHADOW_SCALE_SHIFT 3
+
+#define ASAN_SHADOW_SCALE_SIZE	(1UL << ASAN_SHADOW_SCALE_SHIFT)
+#define ASAN_SHADOW_MASK	(ASAN_SHADOW_SCALE_SIZE - 1)
+
+#define ASAN_GLOBAL_REDZONE	0xFA
+#define ASAN_STACK_LEFT		0xF1
+#define ASAN_STACK_MID		0xF2
+#define ASAN_STACK_RIGHT	0xF3
+#define ASAN_STACK_PARTIAL	0xF4
+#define ASAN_USE_AFTER_SCOPE	0xF8
+
+#define _RET_IP_	((unsigned long)__builtin_return_address(0))
+#define likely(x)	__builtin_expect(!!(x), 1)
+#define unlikely(x)	__builtin_expect(!!(x), 0)
+
+#define WARN_ON(condition) ({	\
+	int __ret_warn_on = !!(condition);	\
+	unlikely(__ret_warn_on);	\
+})
+
+#ifndef ASAN_ABI_VERSION
+#define ASAN_ABI_VERSION 5
+#endif
+
+/* The layout of struct dictated by compiler */
+struct asan_source_location {
+	const char *filename;
+	int line_no;
+	int column_no;
+};
+
+/* The layout of struct dictated by compiler */
+struct asan_global {
+	const void *beg;		/* Address of the beginning of the global variable. */
+	size_t size;			/* Size of the global variable. */
+	size_t size_with_redzone;	/* Size of the variable + size of the red zone
+					   32 bytes aligned. */
+	const void *name;
+	const void *module_name;	/* Name of the module where the global variable
+					   is declared. */
+	unsigned long has_dynamic_init;	/* This needed for C++. */
+#if ASAN_ABI_VERSION >= 4
+	struct asan_source_location *location;
+#endif
+#if ASAN_ABI_VERSION >= 5
+	char *odr_indicator;
+#endif
+};
+
+void asan_unpoison_shadow(const void *address, size_t size);
+void asan_report(unsigned long addr, size_t size, bool is_write,
+	unsigned long ip);
+void asan_init(void);
+
+uintptr_t __asan_shadow_offset(uintptr_t addr);
+void __asan_register_globals(struct asan_global *globals, size_t size);
+void __asan_unregister_globals(struct asan_global *globals, size_t size);
+void __asan_poison_stack_memory(const void *addr, size_t size);
+void __asan_unpoison_stack_memory(const void *addr, size_t size);
+
+void __asan_load1(unsigned long addr);
+void __asan_store1(unsigned long addr);
+void __asan_load2(unsigned long addr);
+void __asan_store2(unsigned long addr);
+void __asan_load4(unsigned long addr);
+void __asan_store4(unsigned long addr);
+void __asan_load8(unsigned long addr);
+void __asan_store8(unsigned long addr);
+void __asan_load16(unsigned long addr);
+void __asan_store16(unsigned long addr);
+void __asan_loadN(unsigned long addr, size_t size);
+void __asan_storeN(unsigned long addr, size_t size);
+
+void __asan_load1_noabort(unsigned long addr);
+void __asan_store1_noabort(unsigned long addr);
+void __asan_load2_noabort(unsigned long addr);
+void __asan_store2_noabort(unsigned long addr);
+void __asan_load4_noabort(unsigned long addr);
+void __asan_store4_noabort(unsigned long addr);
+void __asan_load8_noabort(unsigned long addr);
+void __asan_store8_noabort(unsigned long addr);
+void __asan_load16_noabort(unsigned long addr);
+void __asan_store16_noabort(unsigned long addr);
+void __asan_loadN_noabort(unsigned long addr, size_t size);
+void __asan_storeN_noabort(unsigned long addr, size_t size);
+void __asan_handle_no_return(void);
+
+void __asan_set_shadow_00(const void *addr, size_t size);
+void __asan_set_shadow_f1(const void *addr, size_t size);
+void __asan_set_shadow_f2(const void *addr, size_t size);
+void __asan_set_shadow_f3(const void *addr, size_t size);
+void __asan_set_shadow_f5(const void *addr, size_t size);
+void __asan_set_shadow_f8(const void *addr, size_t size);
+
+void __asan_report_load1_noabort(unsigned long addr);
+void __asan_report_store1_noabort(unsigned long addr);
+void __asan_report_load2_noabort(unsigned long addr);
+void __asan_report_store2_noabort(unsigned long addr);
+void __asan_report_load4_noabort(unsigned long addr);
+void __asan_report_store4_noabort(unsigned long addr);
+void __asan_report_load8_noabort(unsigned long addr);
+void __asan_report_store8_noabort(unsigned long addr);
+void __asan_report_load16_noabort(unsigned long addr);
+void __asan_report_store16_noabort(unsigned long addr);
+void __asan_report_load_n_noabort(unsigned long addr, size_t size);
+void __asan_report_store_n_noabort(unsigned long addr, size_t size);
+#endif
diff --git a/src/include/symbols.h b/src/include/symbols.h
index f84672ed22..2fbb449122 100644
--- a/src/include/symbols.h
+++ b/src/include/symbols.h
@@ -24,6 +24,12 @@ DECLARE_REGION(cbfs_cache)
 DECLARE_REGION(fmap_cache)
 DECLARE_REGION(tpm_tcpa_log)
 
+#if CONFIG(ASAN_IN_RAMSTAGE)
+DECLARE_REGION(data)
+DECLARE_REGION(heap)
+DECLARE_REGION(asan_shadow)
+#endif
+
 /* Regions for execution units. */
 
 DECLARE_REGION(payload)